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Why Ac Fan Not Working – Common Reason, What To Do

An air conditioning unit is vital for maintaining comfort during hot weather. One minor issue that can disrupt its function. There could be many reasons why AC fan not working. The fan plays a critical role in circulating air through the system, and its malfunction can lead to a decrease in cooling efficiency or a complete lack of cooling.  

We will guide you through the possible reasons why the air conditioner fan is not working and suggest steps for troubleshooting and fixing the problem. Further, you can reach out to us for ac repairing service in Nagpur.

Understanding the AC Fan

The AC system typically has two fans: the evaporator fan (inside unit) and the condenser fan (outside unit). The evaporator’s fan blows air over the coils to distribute cool air through the ducts, while the condenser fan helps release the absorbed heat outside.

Common Reasons Why AC Fan Not Working

Power Issues

Blown a fuse or Circuit Breaker: If the AC unit isn’t powered, the fan won’t run. Inspect the power panel for breakers or blown fuses.

Thermostat Issues: Ensure the thermostat is set correctly and functioning. Dead batteries or incorrect settings can cause the fan not to start.

Motor Problems

Burnt-Out Motor: Over time, the motor can burn out, especially if it has been overworked. A burning smell or unusual noises often accompany this.

Capacitor Failure: Capacitors provide the initial boost to get the fan motor running. A failed capacitor can prevent the fan from starting.

Wiring Issues

Loose or Damaged Wires: Inspect the wiring for any signs of wear, disconnection, or damage, which can interrupt the power supply to the fan.

Mechanical Obstructions

Debris and Dirt: Accumulating debris and dirt around the fan blades can force the fan to jam.

Bent or Broken Fan Blades: Physical damage to the fan blades can prevent the fan from turning properly.

Control Board or Relay Problems

Faulty Control Board: The control board manages the unit’s functions, including the fan. A malfunction here can lead to fan issues.

Defective Relay Switch: The relay switch sends the signal to the fan to start. If it’s faulty, the fan won’t receive the start command.

Steps to Troubleshoot and Fix an AC Fan

1. Check the Power Supply

Circuit Breaker: Ensure the breaker for the AC unit is not tripped. Reset it if necessary.

Thermostat: Confirm the thermostat is on, set to cooling mode, and the temperature is set below the present room temperature.

2. Inspect the Motor and Capacitor

Motor: Listen for humming sounds, which indicate that the motor is trying to start but cannot. If it is silent or makes unusual noises, it might need replacing.

Capacitor: If you are comfortable working with electrical components, use a multimeter to check the capacitor’s charge. If it is defective, replace it.

3. Examine the Wiring

Connections: Turn off the power to the AC unit and inspect all wiring for loose connections, frayed wires, or signs of damage. Tighten or replace as needed.

4. Remove Mechanical Obstructions

Clean the Fan: Remove any debris around the fan and clean the blades.

Fan Blades: Check if the blades are bent or broken and straighten or replace them as necessary.

5. Check the Control Board and Relays

Control Board: Inspect for any visible signs of damage, such as burnt components. This may require professional diagnosis and repair.

Relay Switch: Test the relay switch for continuity. Replace it if it’s not functioning properly.

When to Call a Professional

While you can follow troubleshooting steps, a professional ac technician should handle certain issues like motor replacement, control board problems, or complex electrical work. If you’re unsure about any step, getting help from a professional is the best to avoid further damage or personal injury. 

You can reach out us for air condition repairing service in Nagpur

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